Engine-stopping device



Nov. 4 I924.

R. HILDEBRAND ENGINE STOPPING DEVICE Filed March 14 1921 2 Sheets-Sheet 1 NOV. 4

R. HILDEBRAND ENGINE STOPPING DEVICE Filed March 14 2 Sheets-Sheet 2 1 Jirra Patented Nov. 4, i924.

OFFICE.

IRON WORKS COMPANY, OF ST. LOUIS, MISSGURI, A CORPORATION OF DELAWARE.

ENGINE-STOPPING DEVICE.

Application filed March 14, 1921. Serial No. 452,304.

To all whom it may concern.

Be it known that I, REINHARD HILDE- BRAND, a citizen of Germany, and a resident of Webster Groves, in the county of St. Louis and State of Missouri, have invented certain new and useful Improvements in Engine-Stopping Devices, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to improvements in engine stopping devices, and more particularly to means for stopping an internal combustion engine having a pump whereby fuel is delivered to the combustion chamber in the engine. The object is to provide a simple and effective means whereby an engine of this type can be stopped by an operator at a point remote. from the engine. A stop ping device of this kind is desirable for several reasons. In case of fire in the engine room or in the event of accidental breakage of some part of the engine, and also when there is accidental leakage of inflammable fluid from a pump driven by the engine, it is usually desirable to stop the engine through the medium of an operating device remote from the engine, and this can be accomplished by means of the device herein disclosed. H

Briefly stated, the stopping device includes an operating member remote from the engine and connecting devices leading from said operating member to the fuel pump, the latter being stopped to discontinue the delivery of fuel to the internal. combustion engine.

Fig. I is a side elevation illustrating certain parts of an internal combustion engine equipped with a stopping device embodying the features of this invention.

Fig. II is an enlarged fragmentary vertical section, partly in elevation, illustrating the fuel pump whereby liquid fuel is forced to the engine, and showing the means whereby this pump may be rendered inoperative to stop the engine.

Fig. III is a horizontalsection showing the locking means whereby a tripping device is normally held in an inoperative position.

Fig. IV is a vertical section taken approximately through the center of Fig. III.

The engine shown in Fig. I includes a frame 1 supporting a cylinder 2, and a fuel 1nlet dev1ce 3 mounted on the cylinder to provide for the admission of fuel to the combustion chamber of the engine. 4 designates a pipe through which liquid fuel is conducted to the inlet device 3. I do not deem it necessary to show or describe all of the elements of the engine, for such elements are old and well known in theart, and theengine herein shown may be con sidered as an internal combustion engine of the Diesel type having a fuel pump for the dellvery of liquid fuel to the combustion chamber. w

The pump shown in Fig. IIincludes a plunger 8 adapted to reciprocate in a'block 9, the latter being bored to form apump cylinder. The fuel is conducted through an 1nlet passageway 10 to an inlet, port 11 adapted to be closed by aspring actuated check valve 12. The pump is also provided with a discharge passageway 13 adapted to be closed by spring pressed valves 16. When the pump plunger 8 moves upwardly, liquid fuel is drawn from the passageway 10 and through the inlet port 11, the inlet valve 12 being free to open in response to the movement of the incomin liquid. During each downward stroke of t e pump plunger, liquid fuel is displaced and discharged through the passageway 13 containing the springactuated check valves 16 which permit'the outgoing liquid to flow through the passageway 18 and also through a passageway 17 leading to the fuel conducting pipe 4. The means for operating the pump plunger 8 includes a rotary shaft 17 provided withan eccentric l8 surrounded by an eccentric strap 19 having its lower end pivoted at 20 to the upper end of a tubular driver21, the latter being movable vertically in a guide 22. To transmit downward movement to the pump plunger, the tubular driver 21 is provided with a striking block 23 adapted to engage an abutment 2 f screwed onto the upper end of the plunger 8. 'This plunger also carries a sleeve 25 confined between the abutment 24; and a collar 26, the lower end of sleeve 25 being larger than the diameter of collar 26, so as to provide an abutment shoulder 25. The pump operating mechanism also includes a trippable connecting lever 27, pivotpositions shown in the drawings.

driver 21, and provided with an abutment block 27 adapted to engage the abutment shoulder 25' at the lower end of sleeve 25. The connecting lever '7 is yieldingly connected to the driver 21 by means of a spring attached to an arm 30 on the rear of the driver, and this spring tends to retain the connecting lever 27 in the position shown by Fig. II wherein the abutment 27 engages the lower end of sleeve 25.

When the eccentric strap 19 moves downwardly, it imparts a downward movement to the tubular" driver 21 and motion is trans mitted from the striking block 23 to the abutment 24 on the upper end of pump plunger 8, so as to positively impart a downward movement to the pump plunger. During the return stroke, when the driver 21 moves upwardly, motion is transmitted from said driver, through the pivot 28 and lever 27, to the abutment 27 which engages the lower end of sleeve 25 so as to impart an upward movement to the pump plunger.

A reciprocating motion is thus imparted to the pump plunger 8 for the purpose of forcing liquid fuel to the engine, and it is to be understood that the lever 27 may be shifted about the axis of its fulcrum 28, so as to, prevent the transmission of movement to the'pump plunger, thereby stopping the pump and discontinuing the delivery of fuel to the engine. I

I will now describe the means for shifting the lever 27 to the position, shown by dotted linesin Fig. II, so as to disconnect the reciprocating driver 21 from the pump plunger 8. This means comprises a tripping device including an arm 32 provided with an upwardly extending cam 33, a shaft 34 to which said arm is secured, an operating arm 36 fixed to said shaft, a spring 37 tending to actuate the arm 36, and locking rod 38 extending through an opening in one end of arm 36, the latter being engaged with a nut 39 at the lower end of rod 38, and a locking member 40 which cooperates with the locking rod 38, as will be presently described, to retain the arms 36 and 32 in the When the locking rod 38isreleased, the spring 37 will move the arm 36 downwardly from the position shown in Fig. II, thereby elevat ing the arm 32 and at the same time shifting its cam 33, so as to displace the connecting lever 37 from the position shown by full lines in Fig. II to the inoperative position shown by dotted lines, thereby disconnecting the driver 21 from the pump P ung r As shown most clearly in Figs. III and IV, the locking rod 38 passes through a slot in the locking member 40, and this member 40 is slidably mounted in a guide 41. The locking rod 38 (Fig. IV) is provided with a shoulder 38 which normally rests upon the locking member 40 to prevent downward movement of locking rod 38, and the locking rod is thus locked in its elevated position to retain the spring actuated arm and its cam 33 in the. positions shown by Fig. II. I

The means for operating the locking member 40 includes a spring 42 whereby the locking member is normally held in the position shown by Figs. III and IV, and pull rod 43 secured to and extending from said locking member 40, said pull rod having a head adapted to be engaged by an arm 44 fixed to a shaft 45 provided with an operating arm 46 to which a pull rod 47 is pivot-ally connected. The means for trans mitting motion to the pull rod'47 is shown by F ig. I. 48 designates a bell crank lever pivoted to the pull rod 47, and 49 designates an operating member, preferably a long flexible cable extending from the'bell crank lever 48 to a point remote from the pump and engine, said operating member 49 being provided with a handle 50 which may be located outside of the building in which the engine is mounted.

The operation of the engine stopping device may be briefly described as follows:

lVhen the operating handle 50 is pulled to the left from the position shown by Fig. I, motion is transmitted to the bell crank 48 to pull the rod 47 in a downward direction, thereby actuating the arm 46 at the upper end of rod 47' (Figs. I and IV), so as to actuate the arm 44, thereby moving the locking member 40 to the left from the position shown in Fig. IV to. release the looking rod 38. The spring 37 (Figs. I and II) then actuates the arms 36 and 32 to shift the cam 33, whereby the connecting lever 27 is displaced to the position shown by dotted lines in Fig. II. The pump plunger is thus disconnected from the driver 21 to discontinue the delivery of fuel to the engine. It is to be understood that the pump operating shaft 17 at the upper portion of Fig. II may be operated by the engine, and that this shaft may turn a few'revolutions after the pump plunger has been disconnected.

I claim:

1. An internal combustion engine provided with a pump for the delivery of fuel to the engine, pump operating means ineluding a driver and a connecting device whereby motion is transmitted from said driver to said pump, and an engine stopping device adapted to disconnect said driver from the pump to stop the engine, said engine stopping device including a tripping device movable to disconnect the driver from the pump, a spring tending toactuate said tripping device, a locking. member whereby said tripping device is held in an inoperative position, and a manually operable unlocking device adapted to release said locking member from said tripping device.

2. An internal combustion engine pro vided with a pump for the delivery of fuel to the engine, pump operating means including a driver and a connecting device whereby motion is transmitted from said driver to said pump, and an engine stopping device adapted to disconnect said driver from the pump to stop the engine, saidenzine stopping device including a tripping device adapted to disconnect said driver from said pump, a spring tending to actuate said tripping device, a locking member whereby said tripping device is held in an inoperative position, an operating member remote from said locking member, and means for transmitting motion from said operating member to said locking member.

3. An internal combustion engine pro vided with a pump for the delivery of fuel to the engine, pump-operating means including a driver and a connecting device whereby motion is transmitted from said driver to said pump, and an engine-stopping device adapted to disconnect said driver from the pump to stop the engine, said engine-stopping device including a tripping device adapted to disconnect said driver from said pump, means tending to actuate said tripping device, a locking member whereby said tripping device is held in an inoperative position, an operating member remote from said locking member, and means for transmitting motion from said operating member to said locking memher.

In testimony that I claim the foregoing I hereunto aflix my signature.

REINHARD HILDEBRAND. 

